Secret Quantum Communication of a Reference Frame

2006/08/31 by Giulio Chiribella, Lorenzo Maccone, Paolo Perinotti · 3 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.98.120501

published as Phys. Phys, Rev. Lett. 98, 120501 (2007) · 4 pages, no figures; published version

openalex publication_date 2007/03/19 · arxiv created 2008/10/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose quantum-cryptographic protocols to secretly communicate a reference frame--unspeakable information in the sense it cannot be encoded into a string of bits. Two distant parties can secretly align their Cartesian axes by exchanging N spin-1/2 particles, achieving the optimal accuracy 1/N. A possible eavesdropper cannot gain any information without being detected.

Citations

• Classical and Quantum Communication without a Shared Reference Frame

Cited by

• Secure alignment of coordinate systems using quantum correlation
• Experimental Demonstration of Secure Quantum Remote Sensing
• An information entropy interpretation of photon absorption by dielectric media